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Largemouth bass virus in Texas: distribution and management issues
Gregory M Southard1, Loraine T Fries, David R Terre
1Texas Parks and Wildlife Department, A. E. Wood Laboratory, San Marcos, Texas 78666, USA. greg.southard@tpwd.state.tx.us
Journal of Aquatic Animal Health
|June 3, 2009
Summary
Largemouth bass virus (LMBV) was detected in 19 Texas water bodies following fish kills. The virus prevalence was low, but informed statewide stocking strategies to prevent further spread.
Area of Science:
- Ichthyology
- Virology
- Aquatic Ecology
Background:
- Fish kills at prominent largemouth bass fishing sites prompted an investigation.
- Largemouth bass virus (LMBV) is a pathogen affecting Micropterus salmoides populations.
- Previous sampling efforts indicated a need for a comprehensive statewide survey.
Purpose of the Study:
- To systematically evaluate Texas waters for the presence and distribution of LMBV.
- To determine the prevalence of LMBV infection in largemouth bass populations.
- To gather scientific information to guide management and stocking strategies.
Main Methods:
- A statewide survey of 49 water bodies and 13 river basins was conducted.
- 2,876 adult largemouth bass were collected using electrofishing and angling.
- Virus detection involved cell culture and polymerase chain reaction confirmation.
Main Results:
- LMBV was detected in 19 water bodies across 9 river basins in Texas.
- The overall prevalence of LMBV was low (1.50 +/- 2.82%).
- LMBV-positive fish showed a higher prevalence of swim bladder anomalies, but this was not a reliable indicator.
Conclusions:
- The survey identified the distribution of LMBV in Texas waters.
- Findings informed statewide fish stocking strategies to mitigate LMBV spread.
- This research contributes to a national understanding of LMBV impacts on fisheries.
